#include <iostream>
#include <unsupported/Eigen/MatrixFunctions>

using namespace Eigen;

int
main()
{
	const double pi = std::acos(-1.0);

	MatrixXd A(3, 3);
	A << 0, -pi / 4, 0, pi / 4, 0, 0, 0, 0, 0;
	std::cout << "The matrix A is:\n" << A << "\n\n";
	std::cout << "The matrix exponential of A is:\n" << A.exp() << "\n\n";
}
